Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb964049ba78a3fa…

MALICIOUS

PDF

73.6 KB Created: 2021-09-19 19:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8f58a206bef40240e0ff8fa889baf8a3 SHA-1: 8e1e5e8fbb463d328e35cbed6a82dfe958958ea9 SHA-256: fb964049ba78a3fab22e7300a790a00c81015d810b4239d7c633add87e8ee2fb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics suggest this document is intended to lead users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=just+go+with+it+full+movie+online PDF link annotation
    • http://globalnetworks.de/www.galabau-poscher.de/main/preview/ckfinder/userfiles/files/25571253519.pdfIn PDF document text
    • http://okfilm.kr/userData/board/file/mijiwamonorigumalekat.pdfIn PDF document text
    • http://crimesla.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78686253444.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e479c3a380---88561701004.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210907180306.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/17700523592.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/161345eac0272a---36805850039.pdfIn PDF document text
    • https://foodexgida.com/uploads/files/bafadugusujomeloko.pdfIn PDF document text
    • http://luxmeterthai.com/ckfinder/userfiles/files/bakutojixodamul.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/titiborivaleso.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134ed38a93aa---54770771811.pdfIn PDF document text
    • https://tebra.si/userfiles/file/34186081214.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/0bbf698618b1158cbb877b1799523c43/94804145250.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/cb8c02d1d62f6abb3d0702db555ac673/vufinizaroge.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/firumanuwefopupases.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/texapazuperorenevufuju.pdfIn PDF document text
    • http://www.tivafa.hu/upload/file/tanevewurimifuganuw.pdfIn PDF document text
    • http://bacsiha.com/public/ckfinder/userfiles/files/87292019707.pdfIn PDF document text
    • https://pgp-puh.hr/fck_media/file/85377481354.pdfIn PDF document text
    • http://thanhnhomdinhhinh.net/uploads/files/fusejajokawa.pdfIn PDF document text
    • https://drivetripper.com/userfiles2020/files/72308694499.pdfIn PDF document text
    • https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/78091479112.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/5694087455.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/2509668599.pdfIn PDF document text
    • https://studybrilliant.online/app/webroot/img/userfiles/file/zufusosabefutu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000babe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D0 17452 bytes
SHA-256: 18ab4a3f00649ffa1482ddfd88a5c13479a3bdda630717338fc808dfa91ad4a1
font_02_sfnt_off00010063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10063 10640 bytes
SHA-256: 9f447e845f68cc6595d6b4d5acdeae7fbc19bb4d1b0d09936ad42314b67c2979

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